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import datetime

import flask
import flask_login
from flask import session as flask_session

from airflow.configuration import conf


def init_logout_timeout(app):
    """Add logout user after timeout"""

    def before_request():
        _force_log_out_after = conf.getint('webserver', 'FORCE_LOG_OUT_AFTER', fallback=0)
        if _force_log_out_after > 0:
            flask.session.permanent = True
            app.permanent_session_lifetime = datetime.timedelta(minutes=_force_log_out_after)
            flask.session.modified = True
            flask.g.user = flask_login.current_user

    app.before_request(before_request)


def init_permanent_session(app):
    """Make session permanent to allows us to store data"""

    def make_session_permanent():
        flask_session.permanent = True

    app.before_request(make_session_permanent)
